* Added username field to PG and removed defaultvalue for port
* Disabled system username for miaa. Added username to pg create notebook.
* Block system for pg username
* Remove sql username from pg create
* Add service type
* bump version for preview
* Add dev use label
* Changed postgres icon
* Fixed PG create page not displaying. Wrong type
* Fixed service type
* changed naming for admin usernames sql and pg
* sql and pg dev use fix
* Move port under service type and make storage class not required
* Fixed regex to include things like sa1 system1
* Made storage class params optional
* Added placeholder text and changed PG admin username label
* Remove backups
* Removed postgres hardcoded username in connectionstring
* Remove more postgres username hardcoded
Co-authored-by: Candice Ye <canye@microsoft.com>
